分解因式:(1)a2x2y﹣axy2(2)x(x﹣y)﹣y(y﹣x)(3)9(a﹣b)2﹣16(a+b)2(4)25(x﹣y)2+10(y﹣x)+1(5)﹣3x3+12x2y﹣12xy2(6)m(x﹣y)2﹣x+y.